After generating an ebook interior file, verify that the page size and number of pages are as expected and that no page has a gutter overlap.
Preliminary
Open a given ebook interior file in the Acrobat Reader application.
Verifry Page Size and Number of Pages
Select the “Document Properties…” item in the “File” menu.
In the “Desciption” tab of the “Document Properties” modal window, verify the “Page Size” value and the “Number of Pages” value.
Verify Gutter Overlap
In the “View” menu, enable:
Two-page view
Show cover page
For each page in a given ebook interior file, verify that there is no gutter overlap.
Here’s an example of a gutter overlap that needs to be fixed: